--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ * Lei Xia <lxia@northwestern.edu>
+ *
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_dev_mgr.h>
+#include <devices/lnx_virtio_pci.h>
+#include <devices/lnx_virtio_nic.h>
+#include <palacios/vm_guest_mem.h>
+
+#include <devices/pci.h>
+
+
+#ifndef CONFIG_DEBUG_VIRTIO_BLK
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+#define NIC_STATUS_OK 0
+#define NIC_STATUS_ERR 1
+#define NIC_STATUS_NOT_SUPPORTED 2
+
+
+/* The feature bitmap for virtio net */
+#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
+#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
+#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
+#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
+#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
+#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
+#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+
+/* Maximum packet size we can receive from tap device: header + 64k */
+#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
+
+
+struct virtio_net_hdr {
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
+ uint8_t flags;
+
+#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
+#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
+#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
+#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
+#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
+ uint8_t gso_type;
+
+ uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
+ uint16_t gso_size; /* Bytes to append to hdr_len per frame */
+ uint16_t csum_start; /* Position to start checksumming from */
+ uint16_t csum_offset; /* Offset after that to place checksum */
+}__attribute__((packed));
+
+
+
+
+#define QUEUE_SIZE 256
+#define CTRL_QUEUE_SIZE 64
+
+
+struct v3_net_ops {
+ int (*send)(uint8_t * buf, uint32_t count, void * private_data);
+ int (*receive)(uint8_t * buf, uint32_t count, void * private_data);
+};
+
+
+#define ETH_ALEN 6
+
+struct virtio_net_config
+{
+ uint8_t mac[ETH_ALEN];
+ // See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above
+ uint16_t status;
+} __attribute__((packed));
+
+struct virtio_net_state {
+ struct virtio_net_config net_cfg;
+ struct virtio_config virtio_cfg;
+
+ struct vm_device * pci_bus;
+ struct pci_device * pci_dev;
+
+ struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
+ struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
+ struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
+
+ struct v3_net_ops * net_ops;
+
+ int io_range_size;
+
+ void *private_data;
+};
+
+
+static int virtio_free(struct vm_device * dev)
+{
+
+ return -1;
+}
+
+static int virtio_reset(struct vm_device * dev)
+{
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+
+ virtio->rx_vq.ring_desc_addr = 0;
+ virtio->rx_vq.ring_avail_addr = 0;
+ virtio->rx_vq.ring_used_addr = 0;
+ virtio->rx_vq.pfn = 0;
+ virtio->rx_vq.cur_avail_idx = 0;
+
+ virtio->tx_vq.ring_desc_addr = 0;
+ virtio->tx_vq.ring_avail_addr = 0;
+ virtio->tx_vq.ring_used_addr = 0;
+ virtio->tx_vq.pfn = 0;
+ virtio->tx_vq.cur_avail_idx = 0;
+
+ virtio->ctrl_vq.ring_desc_addr = 0;
+ virtio->ctrl_vq.ring_avail_addr = 0;
+ virtio->ctrl_vq.ring_used_addr = 0;
+ virtio->ctrl_vq.pfn = 0;
+ virtio->ctrl_vq.cur_avail_idx = 0;
+
+ virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
+ virtio->virtio_cfg.pci_isr = 0;
+ virtio->private_data = NULL;
+
+ return 0;
+}
+
+static int read_op(struct vm_device * dev, uint8_t * buf, uint32_t len)
+{
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ int ret = -1;
+
+ PrintDebug("Receving pkt from guest\n");
+
+ ret = virtio->net_ops->receive(buf, len, virtio->private_data);
+ return ret;
+}
+
+
+static int write_op(struct vm_device *dev, uint8_t *buf, uint32_t len)
+{
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ int ret = -1;
+
+ PrintDebug("Receving pkt from guest\n");
+
+ ret = virtio->net_ops->send(buf, len, virtio->private_data);
+
+ return ret;
+}
+
+
+//sending guest's packet to network sink
+static int handle_pkt_write(struct vm_device *dev, struct virtio_net_hdr *hdr,
+ struct vring_desc *buf_desc, uint8_t *status)
+{
+ //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ uint8_t * buf = NULL;
+
+ PrintDebug("Handling Virtio Net write\n");
+
+ if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ PrintError("Could not translate buffer address\n");
+ return -1;
+ }
+
+ PrintDebug("Length=%d\n", buf_desc->length);
+
+ if (write_op(dev, buf, buf_desc->length) == -1) {
+ *status = NIC_STATUS_ERR;
+ return -1;
+ } else {
+ *status = NIC_STATUS_OK;
+ }
+
+ PrintDebug("Returning Status: %d\n", *status);
+
+ return 0;
+}
+
+
+
+//get packet from network, and send to guest
+static int handle_pkt_read(struct vm_device *dev, struct virtio_net_hdr *hdr,
+ struct vring_desc *buf_desc, uint8_t *status)
+{
+ //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ uint8_t * buf = NULL;
+
+ PrintDebug("Handling Virtio Net read\n");
+
+ if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ PrintError("Could not translate buffer address\n");
+ return -1;
+ }
+
+ PrintDebug("Length=%d\n", buf_desc->length);
+
+ if (read_op(dev, buf, buf_desc->length) == -1) {
+ *status = NIC_STATUS_ERR;
+ return -1;
+ } else {
+ *status = NIC_STATUS_OK;
+ }
+
+ PrintDebug("Returning Status: %d\n", *status);
+
+ return 0;
+}
+
+static int get_desc_count(struct virtio_queue * q, int index)
+{
+ struct vring_desc * tmp_desc = &(q->desc[index]);
+ int cnt = 1;
+
+ while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
+ tmp_desc = &(q->desc[tmp_desc->next]);
+ cnt++;
+ }
+
+ return cnt;
+}
+
+
+static int handle_ctrl(struct vm_device * dev) {
+
+
+ return 0;
+}
+
+// TODO: handle receiving, not done yet
+//send packet to guest
+static int handle_pkt_rx(struct vm_device * dev)
+{
+
+ if (handle_pkt_read(dev, NULL, 0, NULL) == -1) {
+ PrintError("Error handling nic operation\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+//get packet from guest
+static int handle_pkt_tx(struct vm_device * dev)
+{
+ struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
+ struct virtio_queue *q = &(virtio->rx_vq);
+
+ PrintDebug("VIRTIO NIC KICK: cur_index=%d (mod=%d), avail_index=%d\n",
+ q->cur_avail_idx, q->cur_avail_idx % QUEUE_SIZE, q->avail->index);
+
+ while (q->cur_avail_idx < q->avail->index) {
+ struct vring_desc * hdr_desc = NULL;
+ struct vring_desc * buf_desc = NULL;
+ struct vring_desc * status_desc = NULL;
+ struct virtio_net_hdr hdr;
+ addr_t hdr_addr = 0;
+ uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
+ int desc_cnt = get_desc_count(q, desc_idx);
+ int i = 0;
+ uint8_t * status_ptr = NULL;
+ uint8_t status = NIC_STATUS_OK;
+ uint32_t req_len = 0;
+
+ PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE);
+
+ hdr_desc = &(q->desc[desc_idx]);
+
+ PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
+ (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
+
+ if (guest_pa_to_host_va(dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ PrintError("Could not translate block header address\n");
+ return -1;
+ }
+
+ // We copy the block op header out because we are going to modify its contents
+ memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
+
+ PrintDebug("NIC Op Hdr (ptr=%p) type=%d, sector=%p\n", (void *)hdr_addr, hdr.hdr_len, (void *)hdr.csum_start);
+
+ desc_idx = hdr_desc->next;
+
+ for (i = 0; i < desc_cnt - 2; i++) {
+ uint8_t tmp_status = NIC_STATUS_OK;
+
+ buf_desc = &(q->desc[desc_idx]);
+
+ PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
+ (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
+
+ if (handle_pkt_write(dev, &hdr, buf_desc, &tmp_status) == -1) {
+ PrintError("Error handling nic operation\n");
+ return -1;
+ }
+
+ if (tmp_status != NIC_STATUS_OK) {
+ status = tmp_status;
+ }
+
+ req_len += buf_desc->length;
+ desc_idx = buf_desc->next;
+ }
+
+ status_desc = &(q->desc[desc_idx]);
+
+ PrintDebug("Status Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", status_desc,
+ (void *)(status_desc->addr_gpa), status_desc->length, status_desc->flags, status_desc->next);
+
+ if (guest_pa_to_host_va(dev->vm, status_desc->addr_gpa, (addr_t *)&(status_ptr)) == -1) {
+ PrintError("Could not translate status address\n");
+ return -1;
+ }
+
+ req_len += status_desc->length;
+ *status_ptr = status;
+
+ q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
+ q->used->ring[q->used->index % QUEUE_SIZE].length = req_len; // What do we set this to????
+
+ q->used->index++;
+ q->cur_avail_idx++;
+ }
+
+ if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
+ PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
+ v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ virtio->virtio_cfg.pci_isr = 0x1;
+ }
+
+ return 0;
+}
+
+
+static int virtio_setup_queue(struct vm_device * dev, struct virtio_queue *queue, addr_t pfn, addr_t page_addr)
+{
+ queue->pfn = pfn;
+
+ queue->ring_desc_addr = page_addr ;
+ queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
+ queue->ring_used_addr = (queue->ring_avail_addr + \
+ sizeof(struct vring_avail) + \
+ (QUEUE_SIZE * sizeof(uint16_t)));
+
+ // round up to next page boundary.
+ queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
+
+ if (guest_pa_to_host_va(dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
+ PrintError("Could not translate ring descriptor address\n");
+ return -1;
+ }
+
+
+ if (guest_pa_to_host_va(dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
+ PrintError("Could not translate ring available address\n");
+ return -1;
+ }
+
+
+ if (guest_pa_to_host_va(dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
+ PrintError("Could not translate ring used address\n");
+ return -1;
+ }
+
+ PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
+ (void *)(queue->ring_desc_addr),
+ (void *)(queue->ring_avail_addr),
+ (void *)(queue->ring_used_addr));
+
+ PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
+ queue->desc, queue->avail, queue->used);
+
+ return 0;
+}
+
+
+
+static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
+{
+ struct vm_device * dev = (struct vm_device *)private_data;
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ int port_idx = port % virtio->io_range_size;
+
+
+ PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n",
+ port, port_idx, length, *(uint32_t *)src);
+
+
+ switch (port_idx) {
+ case GUEST_FEATURES_PORT:
+ if (length != 4) {
+ PrintError("Illegal write length for guest features\n");
+ return -1;
+ }
+
+ virtio->virtio_cfg.guest_features = *(uint32_t *)src;
+ PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
+
+ break;
+ case VRING_PG_NUM_PORT:
+ if (length == 4) {
+ addr_t pfn = *(uint32_t *)src;
+ addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
+
+ uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
+ switch (queue_idx) {
+ case 0:
+ virtio_setup_queue(dev, &virtio->rx_vq, pfn, page_addr);
+ break;
+ case 1:
+ virtio_setup_queue(dev, &virtio->tx_vq, pfn, page_addr);
+ break;
+ case 2:
+ virtio_setup_queue(dev, &virtio->ctrl_vq, pfn, page_addr);
+ break;
+
+ default:
+ break;
+ }
+ } else {
+ PrintError("Illegal write length for page frame number\n");
+ return -1;
+ }
+ break;
+ case VRING_Q_SEL_PORT:
+ virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
+
+ if (virtio->virtio_cfg.vring_queue_selector > 2) {
+ PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
+ virtio->virtio_cfg.vring_queue_selector);
+ return -1;
+ }
+
+ break;
+ case VRING_Q_NOTIFY_PORT:
+ PrintDebug("Handling Kick\n");
+ uint16_t queue_idx = *(uint16_t *)src;
+ if (queue_idx == 0){
+ if (handle_pkt_rx(dev) == -1) {
+ PrintError("Could not handle NIC Notification\n");
+ return -1;
+ }
+ }else if (queue_idx == 1){
+ if (handle_pkt_tx(dev) == -1) {
+ PrintError("Could not handle NIC Notification\n");
+ return -1;
+ }
+ }else if (queue_idx == 2){
+ if (handle_ctrl(dev) == -1) {
+ PrintError("Could not handle NIC Notification\n");
+ return -1;
+ }
+ }else {
+ PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
+ queue_idx);
+ }
+
+ break;
+ case VIRTIO_STATUS_PORT:
+ virtio->virtio_cfg.status = *(uint8_t *)src;
+
+ if (virtio->virtio_cfg.status == 0) {
+ PrintDebug("Resetting device\n");
+ virtio_reset(dev);
+ }
+
+ break;
+
+ case VIRTIO_ISR_PORT:
+ virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
+ break;
+ default:
+ return -1;
+ break;
+ }
+
+ return length;
+}
+
+
+static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
+{
+ struct vm_device * dev = (struct vm_device *)private_data;
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+ int port_idx = port % virtio->io_range_size;
+ uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
+
+
+ PrintDebug("VIRTIO NIC Read for port %d (index =%d), length=%d\n",
+ port, port_idx, length);
+
+ switch (port_idx) {
+ case HOST_FEATURES_PORT:
+ if (length != 4) {
+ PrintError("Illegal read length for host features\n");
+ return -1;
+ }
+
+ *(uint32_t *)dst = virtio->virtio_cfg.host_features;
+
+ break;
+ case VRING_PG_NUM_PORT:
+
+ if (length != 4) {
+ PrintError("Illegal read length for page frame number\n");
+ return -1;
+ }
+
+ switch (queue_idx) {
+ case 0:
+ *(uint32_t *)dst = virtio->rx_vq.pfn;
+ break;
+ case 1:
+ *(uint32_t *)dst = virtio->tx_vq.pfn;
+ break;
+ case 2:
+ *(uint32_t *)dst = virtio->ctrl_vq.pfn;
+ break;
+ default:
+ break;
+ }
+
+ break;
+ case VRING_SIZE_PORT:
+ if (length != 2) {
+ PrintError("Illegal read length for vring size\n");
+ return -1;
+ }
+
+ switch (queue_idx) {
+ case 0:
+ *(uint16_t *)dst = virtio->rx_vq.queue_size;
+ break;
+ case 1:
+ *(uint32_t *)dst = virtio->tx_vq.queue_size;
+ break;
+ case 2:
+ *(uint32_t *)dst = virtio->ctrl_vq.queue_size;
+ break;
+ default:
+ break;
+ }
+
+ break;
+ case VIRTIO_STATUS_PORT:
+ if (length != 1) {
+ PrintError("Illegal read length for status\n");
+ return -1;
+ }
+
+ *(uint8_t *)dst = virtio->virtio_cfg.status;
+ break;
+
+ case VIRTIO_ISR_PORT:
+ *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
+ virtio->virtio_cfg.pci_isr = 0;
+ v3_pci_lower_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ break;
+
+ default:
+ PrintError("Read of Unhandled Virtio Read\n");
+ return -1;
+ }
+
+ return length;
+}
+
+
+static struct v3_device_ops dev_ops = {
+ .free = virtio_free,
+ .reset = virtio_reset,
+ .start = NULL,
+ .stop = NULL,
+};
+
+
+int v3_virtio_register_nic(struct vm_device *dev, struct v3_net_ops *ops, void *private_data) {
+ struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
+
+ virtio->net_ops = ops;
+
+ return 0;
+}
+
+
+static int virtio_init(struct guest_info * vm, void *cfg_data) {
+ struct vm_device * pci_bus = v3_find_dev(vm, (char *)cfg_data);
+ struct virtio_net_state * virtio_state = NULL;
+ struct pci_device * pci_dev = NULL;
+
+ PrintDebug("Initializing VIRTIO Network device\n");
+
+ if (pci_bus == NULL) {
+ PrintError("VirtIO network devices require a PCI Bus");
+ return -1;
+ }
+
+ virtio_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
+ memset(virtio_state, 0, sizeof(struct virtio_net_state));
+
+ struct vm_device * dev = v3_allocate_device("LNX_VIRTIO_NIC", &dev_ops, virtio_state);
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", "LNX_VIRTIO_NIC");
+ return -1;
+ }
+
+
+ // PCI initialization
+ {
+ struct v3_pci_bar bars[6];
+ int num_ports = sizeof(struct virtio_config);
+ int tmp_ports = num_ports;
+ int i;
+
+ // This gets the number of ports, rounded up to a power of 2
+ virtio_state->io_range_size = 1; // must be a power of 2
+
+ while (tmp_ports > 0) {
+ tmp_ports >>= 1;
+ virtio_state->io_range_size <<= 1;
+ }
+
+ // this is to account for any low order bits being set in num_ports
+ // if there are none, then num_ports was already a power of 2 so we shift right to reset it
+ if ((num_ports & ((virtio_state->io_range_size >> 1) - 1)) == 0) {
+ virtio_state->io_range_size >>= 1;
+ }
+
+ for (i = 0; i < 6; i++) {
+ bars[i].type = PCI_BAR_NONE;
+ }
+
+ PrintDebug("Virtio-NIC io_range_size = %d\n", virtio_state->io_range_size);
+
+ bars[0].type = PCI_BAR_IO;
+ bars[0].default_base_port = -1;
+ bars[0].num_ports = virtio_state->io_range_size;
+
+ bars[0].io_read = virtio_io_read;
+ bars[0].io_write = virtio_io_write;
+ bars[0].private_data = dev;
+
+ pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
+ 0, PCI_AUTO_DEV_NUM, 0,
+ "LNX_VIRTIO_NIC", bars,
+ NULL, NULL, NULL, dev, NULL);
+
+ if (!pci_dev) {
+ PrintError("Could not register PCI Device\n");
+ return -1;
+ }
+
+ pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
+ pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
+
+
+ pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
+ pci_dev->config_header.class = PCI_CLASS_NETWORK;
+ pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
+
+ // TODO:how to define new one for virtio net device
+ pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_SUBDEVICE_ID;
+
+
+ pci_dev->config_header.intr_pin = 1;
+
+ pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
+
+
+ virtio_state->pci_dev = pci_dev;
+ virtio_state->pci_bus = pci_bus;
+ }
+
+ virtio_state->virtio_cfg.host_features = 0; //no features support now
+
+ virtio_state->rx_vq.queue_size = QUEUE_SIZE;
+ virtio_state->tx_vq.queue_size = QUEUE_SIZE;
+ virtio_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
+
+
+ virtio_reset(dev);
+
+// TODO: net ops
+ virtio_state->net_ops = NULL;
+
+ return 0;
+}
+
+
+device_register("LNX_VIRTIO_NIC", virtio_init)
+
